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Official Description

Open treatment of posterior malleolus fracture, includes internal fixation, when performed

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

Open treatment of a posterior malleolus fracture involves a surgical procedure aimed at correcting a specific type of fracture located at the back of the ankle joint, known as the posterior malleolus. This procedure is performed through a surgical incision made on the posterolateral aspect of the ankle, which allows the surgeon to access the fractured area while taking precautions to avoid damaging the sural nerve, a critical nerve that runs in close proximity to the surgical site. During the operation, the surgeon retracts the peroneal and Achilles tendons to gain a clear view of the fracture. The primary goal of this treatment is to realign the fractured bone fragments into their proper anatomical position, which is essential for restoring normal function and stability to the ankle joint. If the fracture is unstable or misaligned, internal fixation may be necessary. This involves the placement of screws, pins, or other fixation devices to hold the bone fragments securely in place. Typically, one or two cancellous screws are inserted from a posterior to anterior direction into the posterior malleolus, although alternative techniques may involve placing screws from anterior to posterior or using lag or cortical screws through a separate incision at the front of the ankle. The success of the procedure is confirmed through visual inspection and radiographic imaging, ensuring that the fracture has been optimally reduced to its normal anatomical position.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The open treatment of a posterior malleolus fracture is indicated for patients who present with specific symptoms or conditions related to this type of fracture. The following are the explicitly provided indications for performing this procedure:

  • Posterior Malleolus Fracture A fracture located at the posterior aspect of the distal fibula, which may be associated with instability of the ankle joint.
  • Displacement of Fracture Fragments When the fracture fragments are displaced and require surgical intervention to restore proper alignment and stability.
  • Inability to Achieve Adequate Reduction In cases where non-surgical methods do not provide sufficient alignment of the fracture, necessitating surgical correction.

2. Procedure

The procedure for the open treatment of a posterior malleolus fracture involves several critical steps to ensure proper alignment and stabilization of the fracture. The following procedural steps are outlined:

  • Step 1: Incision The surgeon begins by making a posterolateral incision over the posterior malleolus. This incision is strategically placed to provide optimal access to the fracture site while minimizing damage to surrounding structures, particularly the sural nerve.
  • Step 2: Retraction of Tendons Once the incision is made, the peroneal and Achilles tendons are carefully retracted. This retraction is essential to expose the fracture site adequately, allowing the surgeon to visualize the fracture and surrounding anatomy.
  • Step 3: Fracture Reduction The surgeon then locates the fracture and proceeds to reduce it into proper alignment. This step is crucial for restoring the normal anatomy of the ankle joint, which is necessary for optimal function.
  • Step 4: Internal Fixation If internal fixation is deemed necessary, the surgeon will place screws, pins, or other fixation devices to stabilize the fracture. Typically, one or two cancellous screws are inserted from a posterior to anterior direction into the posterior malleolus. Alternatively, screws may be placed from anterior to posterior, or lag or cortical screws may be utilized through a separate anterior incision.
  • Step 5: Confirmation of Reduction After the fixation devices are in place, the surgeon confirms that the fracture has been optimally reduced to its normal anatomical position. This confirmation is achieved through both visual inspection and radiographic imaging, ensuring that the alignment is correct before concluding the procedure.

3. Post-Procedure

Post-procedure care for patients who have undergone open treatment of a posterior malleolus fracture typically includes monitoring for any signs of complications, such as infection or improper healing. Patients may be advised to follow specific rehabilitation protocols to promote recovery and restore function to the ankle. This may involve physical therapy to improve strength and range of motion. The expected recovery time can vary based on the severity of the fracture and the individual patient's healing process. Regular follow-up appointments are essential to assess the healing progress and to ensure that the fixation devices remain in place and that the fracture is healing correctly.

Short Descr OPTX POST ANKLE FX
Medium Descr OPEN TREATMENT POSTERIOR MALLEOLUS FRACTURE
Long Descr Open treatment of posterior malleolus fracture, includes internal fixation, when performed
Status Code Active Code
Global Days 090 - Major Surgery
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 2 - Standard payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 1 - 150% payment adjustment for bilateral procedures applies.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 1 - Statutory payment restriction for assistants at surgery applies to this procedure...
Co-Surgeons (62) 0 - Co-surgeons not permitted for this procedure.
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Hospital Part B services paid through a comprehensive APC
ASC Payment Indicator Device-intensive procedure added to ASC list in CY 2008 or later; paid at adjusted rate.
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P1G - Major procedure - Other
MUE 1
CCS Clinical Classification 147 - Treatment, fracture or dislocation of lower extremity (other than hip or femur)
22 Increased procedural services: when the work required to provide a service is substantially greater than typically required, it may be identified by adding modifier 22 to the usual procedure code. documentation must support the substantial additional work and the reason for the additional work (ie, increased intensity, time, technical difficulty of procedure, severity of patient's condition, physical and mental effort required). note: this modifier should not be appended to an e/m service.
51 Multiple procedures: when multiple procedures, other than e/m services, physical medicine and rehabilitation services or provision of supplies (eg, vaccines), are performed at the same session by the same individual, the primary procedure or service may be reported as listed. the additional procedure(s) or service(s) may be identified by appending modifier 51 to the additional procedure or service code(s). note: this modifier should not be appended to designated "add-on" codes (see appendix d).
52 Reduced services: under certain circumstances a service or procedure is partially reduced or eliminated at the discretion of the physician or other qualified health care professional. under these circumstances the service provided can be identified by its usual procedure number and the addition of modifier 52, signifying that the service is reduced. this provides a means of reporting reduced services without disturbing the identification of the basic service. note: for hospital outpatient reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well-being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
58 Staged or related procedure or service by the same physician or other qualified health care professional during the postoperative period: it may be necessary to indicate that the performance of a procedure or service during the postoperative period was: (a) planned or anticipated (staged); (b) more extensive than the original procedure; or (c) for therapy following a surgical procedure. this circumstance may be reported by adding modifier 58 to the staged or related procedure. note: for treatment of a problem that requires a return to the operating/procedure room (eg, unanticipated clinical condition), see modifier 78.
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
78 Unplanned return to the operating/procedure room by the same physician or other qualified health care professional following initial procedure for a related procedure during the postoperative period: it may be necessary to indicate that another procedure was performed during the postoperative period of the initial procedure (unplanned procedure following initial procedure). when this procedure is related to the first, and requires the use of an operating/procedure room, it may be reported by adding modifier 78 to the related procedure. (for repeat procedures, see modifier 76.)
79 Unrelated procedure or service by the same physician or other qualified health care professional during the postoperative period: the individual may need to indicate that the performance of a procedure or service during the postoperative period was unrelated to the original procedure. this circumstance may be reported by using modifier 79. (for repeat procedures on the same day, see modifier 76.)
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
82 Assistant surgeon (when qualified resident surgeon not available): the unavailability of a qualified resident surgeon is a prerequisite for use of modifier 82 appended to the usual procedure code number(s).
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
GC This service has been performed in part by a resident under the direction of a teaching physician
LT Left side (used to identify procedures performed on the left side of the body)
RT Right side (used to identify procedures performed on the right side of the body)
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
Date
Action
Notes
2008-01-01 Added First appearance in code book in 2008.
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